1. Student Worker Training Austin Peay State University Department of Chemistry Fall 2013

2. Student Worker Responsibilities Office Help Office Help Mail Mail Grading Grading Other miscellaneous responsibilities Other miscellaneous responsibilities Computer Lab Attendant Computer Lab Attendant Monitor room Monitor room Note computer problems Note computer problems Keep printer filled with paper Keep printer filled with paper

3. Student Worker Responsibilities General Laboratory Maintenance General Laboratory Maintenance Clean countertops / hoods Clean countertops / hoods Sort / restock lab drawers Sort / restock lab drawers Preparing General Chemistry Labs Preparing General Chemistry Labs Prepare solutions and dispensing solids Prepare solutions and dispensing solids Collect equipment Collect equipment Set up / break down labs Set up / break down labs

4. Arriving to Work… Sign log book in main office Sign log book in main office Report to your assigned supervisor for tasks Report to your assigned supervisor for tasks If your supervisor is unavailable, check “To Do” list If your supervisor is unavailable, check “To Do” list Ask for something to do Ask for something to do There is always something to do!

5. Laboratory Safety Come to work dressed as you would for lab Come to work dressed as you would for lab Always wear goggles when working Always wear goggles when working Clean up after yourself Clean up after yourself Respect others working with you Respect others working with you Label all solutions properly Label all solutions properly Dispose of waste properly Dispose of waste properly Make sure all doors close behind you Make sure all doors close behind you

6. General Chemistry Lab Maintenance Wash down countertops and hoods Wash down countertops and hoods Make sure balances and surrounding areas are clean Make sure balances and surrounding areas are clean Fill all deionized water bottles Fill all deionized water bottles Fill all detergent and hand soap bottles Fill all detergent and hand soap bottles Replenish paper towel supplies Replenish paper towel supplies Replenish weigh boat supply Replenish weigh boat supply Make sure drawers are properly stocked Make sure drawers are properly stocked

7. General Prep Room/Stockroom Maintenance Wash down countertops Wash down countertops Put away clean glassware Put away clean glassware Racks Racks Dishwasher Dishwasher Wash any dirty glassware Wash any dirty glassware Sweep floor Sweep floor Last to leave: Last to leave: Place trash can in Lab A311 Place trash can in Lab A311 Close door between prep room and A311 Close door between prep room and A311

8. Other General Maintenance Cleaning goggles Cleaning goggles Wash with soap & water every Friday Wash with soap & water every Friday Swab with rubbing alcohol during the week as needed Swab with rubbing alcohol during the week as needed Basic equipment repair and setup Basic equipment repair and setup Simple repairs (e.g., fixing broken pipet bulbs) Simple repairs (e.g., fixing broken pipet bulbs) Equipment setup (e.g., calibrating pH meters) Equipment setup (e.g., calibrating pH meters)

9. Laboratory Preparation Introductory labs (CHEM 1011, 1021, 1041, 1111, and 1121) are overseen by the lab manager, Mr. Palmer All other labs are overseen by the responsible faculty member

10. Laboratory Preparation Preparing solutions Preparing solutions Dispensing solids into temporary containers Dispensing solids into temporary containers Gathering equipment Gathering equipment Setting up / removing chemicals and equipment in labs Setting up / removing chemicals and equipment in labs

11. Laboratory Preparation Each introductory lab has an associated prep sheet outlining:  Chemicals  Solutions  Special equipment  Waste disposal

12. Working with Chemicals Always wear goggles Always wear goggles You may need to wear gloves You may need to wear gloves Ask your supervisor or check the Material Safety Data Sheet (MSDS) if unsure of specific hazards Ask your supervisor or check the Material Safety Data Sheet (MSDS) if unsure of specific hazards Clean up all spills / messes immediately Clean up all spills / messes immediately

13. Preparing Solutions Concentrations needed may be approximate or exact Concentrations needed may be approximate or exact Use volumetric glassware for exact concentrations Use volumetric glassware for exact concentrations Can use beakers or poly storage bottles for approximate concentration solutions Can use beakers or poly storage bottles for approximate concentration solutions Some reagents are aqueous solutions and may need to be diluted Some reagents are aqueous solutions and may need to be diluted Use the dilution equation, M c V c = M d V d Use the dilution equation, M c V c = M d V d Always add concentrated acids to water Always add concentrated acids to water All calculations should be checked by your supervisor All calculations should be checked by your supervisor

14. Using a Balance NEVER weigh into weigh boat on balance NEVER weigh into weigh boat on balance Place weigh boat on balance Place weigh boat on balance Tare balance Tare balance Remove weigh boat from balance and add solid Remove weigh boat from balance and add solid Place weigh boat back on balance Place weigh boat back on balance Remove weigh boat again before adding or removing solid Remove weigh boat again before adding or removing solid Dispose of excess solids properly Dispose of excess solids properly NEVER put back into reagent bottle, use beaker as temporary waste container NEVER put back into reagent bottle, use beaker as temporary waste container Ask your supervisor if unsure Ask your supervisor if unsure

15. Labeling Chemicals For introductory labs, labels must match names used in lab For introductory labs, labels must match names used in lab e.g., vinegar vs. acetic acid e.g., vinegar vs. acetic acid Unknowns should match the Prep Sheet Unknowns should match the Prep Sheet Label format: Label format:

16. Labeling Chemical Hazards NFPA = National Fire Protection Association Chemicals rated in 4 categories:  Health (blue)  Fire (red)  Reactivity (yellow)  Specific hazards (white) Each category is rated on a scale of 0 (low risk) to 4 (high risk) The specific hazard category uses symbols to highlight the special hazard.

17. Label Examples Solution: Solid:

18. Volumetric Glassware Used when exact concentration is necessary Volumetric FlasksVolumetric PipetsBurets

19. Other Glassware Beaker Erlenmeyer Flask Mortar & Pestle Buchner Funnel Filter funnel Crucible & Cover Evaporating Dishes Watch Glass Filter Flask Graduated Cylinders

20. Storage Containers Poly Bottles Glass Bottles Carboys Hold 50 – 1000 mL Hold 5 – 30 L Amber Bottles Hold 50 – 1000 mL Vials Hold 1 – 100 mL Wash Bottles Hold 50 – 1000 mL

21. Lab Equipment Ring Stand Tripod Clamp Buret Clamp Bunsen Burner Meeker Burner Flints and Strikers Rings Wire Gauze & Clay Triangle

22. Additional Lab Equipment Test Tube Holders Bottle Brushes Thermometers Crucible Tongs and Beaker Tongs Spatulas and Scoopula Cork and Rubber Stoppers

23. Chemical Waste Always check with your supervisor before throwing anything in the trash Always check with your supervisor before throwing anything in the trash The professor or the lab manager will prepare waste bottles for all chemicals The professor or the lab manager will prepare waste bottles for all chemicals Check label on waste bottle before adding anything Check label on waste bottle before adding anything

24. Chemical Waste Label Waste Label identifies:  Start date  Chemical names  Concentrations  Hazards  Contact info

25. General Waste Disposal Guidelines DO NOT mix organic solvents (acetone, hexane, etc.) with aqueous solutions DO NOT mix organic solvents (acetone, hexane, etc.) with aqueous solutions DO NOT pour chemicals down the drain DO NOT pour chemicals down the drain DO NOT mix halogenated organic solvents (methylene chloride) with non-halogenated organic solvents (hexane) DO NOT mix halogenated organic solvents (methylene chloride) with non-halogenated organic solvents (hexane) Chemicals containing heavy metals (metals larger than Calcium, atomic number > 20) MUST be collected Chemicals containing heavy metals (metals larger than Calcium, atomic number > 20) MUST be collected

26. General Points Safety comes first Safety comes first Clean up after yourself Clean up after yourself Respect chemicals and equipment Respect chemicals and equipment Be responsible and courteous of those around you Be responsible and courteous of those around you Don’t leave doors propped or unlatched Don’t leave doors propped or unlatched Clean up after yourself Clean up after yourself Don’t be afraid to ask questions Don’t be afraid to ask questions There is ALWAYS something to do There is ALWAYS something to do